假设序列对象a的值为 [3, 4, 5, 6, 7, 9, 11, 13, 15, 17] ，那么切片a[1:5] 得到的值是(       )

A、[4,5,6]

B、[4,5,6,7]

C、[3,4,5,6,7,9]

D、[4,5,6,7,9]